C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
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Old Oct 27, 2011 | 02:00 PM
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Default L48 specs

Hey Guys, I just purchased a 72 L48 to restore, would anyone have any engine specs. Its running rough and I would like to do a compression test and replace all the vacuum lines that are plugged off? for a start.

Thanks Barry

Last edited by yyz1970; Oct 27, 2011 at 02:14 PM.
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Old Oct 27, 2011 | 03:46 PM
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Dwell 30 degress
Initial timing 6 BTDC
Spark Plugs R44T at .035 gap.
Idle speed 600RPM in drive for auto.
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Old Oct 27, 2011 | 04:48 PM
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Hi Barry,
New 72 to restore!!!! NICE!!!!
Including the info that Mel posted, a lot more necessary information you'll be needing are in the GM 1972 Chassis Service Manual. This book is available from many of the larger venders and will be worth far more than it's cost as you begin working on your car.
The 72 Assembly Instruction Manual, (AIM), also available from the same venders, will have the vacuum line diagrams; both for the engine and the headlights/wiper door.
Good Luck!
Regards,
Alan

PS: According to my 71 CSM the compression is 160 psi. Max variation 20psi.
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Old Oct 27, 2011 | 05:15 PM
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2025 c3 ('74-'82) of the Year Finalist - Unmodified
2019 C3 of Year Finalist (appearance mods)
Default Welcome!

While your waiting for the books that Alan suggested here's a link to some basic and interesting facts:
http://gmheritagecenter.com/gm-herit...tion-kits.html
Enjoy your new Vette!
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Old Oct 27, 2011 | 09:21 PM
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Default Thanks for your assistance

I've had a few classic cars over the years and have been out of the hobby for over a decade and have always liked early C3's.
I purchased this 72 last week ...Thanks for your help Gentleman.

Cheers, Barry
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Old Oct 27, 2011 | 09:31 PM
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Have fun with your restoration Barry! I recognize that airport code from business travel into Toronto. Do you work in the airline industry?

Mike
EWR
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